Pin stable to previous version (#7)

Pin stable to previous version (#7)

diff --git a/.discourse-compatibility b/.discourse-compatibility
new file mode 100644
index 0000000..4fe382a
--- /dev/null
+++ b/.discourse-compatibility
@@ -0,0 +1 @@
+2.7.13: 219d9ccac0f6666b9c9b9a1b71a087ce5209f93c
\ No newline at end of file

GitHub sha: 2db8a4a5ae8850e8af34c2abbb50e02fae511364

This commit appears in #7 which was approved by eviltrout. It was merged by pmusaraj.